The Great Salt Lake is largest water body in the United States after the Great Lakes. It is a terminal basin, which means the water that pours into the lake from rivers and streams has no outlet other than evaporation. This allows salts and minerals to concentrate in the lake such that it is three to five times saltier than the ocean. And yet this briny lake is a haven for more than 250 species of migratory birds who feast on the brine shrimp and flies that thrive there. http://earthobservatory.nasa.gov/IOTD/view.php?id=88929